Brake-valve device



June 29 ,1926. 1,590,326

H. E. SIMI BRAKE VALVE DEVICE Filed June 12, 1924 INVENTOR HENDRICKESIMI ATTORNEY Patented June 29, 1926.-

UNITED STATES PATENT OFEIQCE.

HENDBIK E.- smnfor OAKLAND, cAL1PonNIA,AssIeNOn rro THEWESTING'HOUSE Am:BRAKE COMPANY, or WILMERDING, PENNSYLVANIA, A CORPORATION OFPENNSYLVANIA.

BRAKE-VALVE DEVICE.

Application lied .Tune 12, 1924. Serialvli'o. 719,542.

This invention relates to brake valve de. vices, and more particularlyto a brake valve device adapted for automotive brakes.

The Aprincipal object of my invention is 5 to provide an improved brakevalve device of the above type.

In the accompanying drawing, the. single figure is a vertical section ofa brake valve device embodying my invention.

' As shown in the drawing, the construction may comprise a casing 1having a chamber containing a iexible diaphragm 2. The daphragm chamberat one side of the diaphragm is closed by a covercasing section 3 havingscrew-threaded engagement with the casing 1 and contained .in thelchamber of said' section is al coil spring 4 which acts on diaphragm 2.A spring follower 15 engages the outer end of the spring and exten-dsout 4o the casingsection 3, so as to be engaged by a manually operablelever 5; Said lever is ivotally mounted on a lug 6, carried by a s eeve7 having screw-threaded engagement with the section 3.

A valve casing 8 is secured to casing 1" and has a valve chamber 9containinga slide valve 10. Pivotally mounted within dia? phragm chamber11 of casin 1 is a rocker arm 12, the free end of whlch has slidingengagement in a sleeve 13, which is pivotally connected to the valve10.;v 'Pivotally con- 'nected to the arm 12 is a rod 14, which lissecured to diaphragm 2, soy that movement of diaphragm 2 moves the arm12 and thereby the valve 10.

A brake chamber (not shown) is connected by pipe 16 to vchamber 11 and asource of fluid under pressure is connected by pipe f 17 to valvechamber 9. l

40 l -In operation, if it is desired to apply the brakes, lthe lever 5is depressed, soI as to compress the spring.y 4 a certain amount and thediaphragm 2 is thenv moved downwardly by `the pressure of the spring.The valve 10` is thus shifted by the operation of the arm 12 so as touncover a port 18, through which fluid under pressure 1s supplied fromvalve chamber 9'to diaphragm chamber 11 and -lgthence' through ipe 16 tothe vbrake cham- "ber so as to ed) brak ect an; application of the Thepressure of Huid supplied 'to the brake l chamber acts in diaphragmchamber 11 on the dia hragm-2 and when the pressure of fluid slightlyexceeds 'the force of spring 4, 63

the diaphragm 2 will be moved upwardly.` The arm 12 is thereby operatedto shift the valve 10 so as to close the port 18 and cut 01T the furthersupply of iui-d to the brake chamber.

To'release the brakes, the lever .5 is relieved of pressure, so thatspring 4 is freed of kpressure and diaphragm 2 is then op erated by thepressure in chamber 11 to shift the valve 10 to lrelease position, asshown in 65 the drawing, in which a cavity 19 connects chamber 11 andthebrake chamber to an atmospheric -exhaust port 20. The release movementis assisted by spring 21 interposed between the diaphragm 2 and a fixed70 abutment 22. The release movement of lever 5 is assisted by spring23.

Having now described/my invention, what I claim as new and ldesire tosecure by Letters Patent, is

1. A brake valve device comprising a casing, a flexible diaphragmmounted 1n said casing, a spring acting on said diaphragm means forvarying the pressure onl said spring, a slide valve for controlling theJfluid 80 pressure for' operating the brakes, a stem cnnected to saiddiaphragm, a rocker arm pivotally connected 1to,said stem, and a 4sleeve in sliding engagement with one end of said arm and pivotallyconnected to said .85 valve.'

2. A brake valve device comprising a cas-` ing, a flexible diaphragmmounted'ln said casin a springacting on Said diaphragm,

a sli e valve for controlling the fluid pres- .b I

sure for operating the brakes, 'a stem connected to said diaphragm, arocker arm plvoted to sa1d casing and operatively con# 'nected to saidva1ve,`said arm being pivotally connected to sald stem at a pointintermediate the casing and the valve connection. In testlmony whereof Ihave hereunto set my hand,

HENDRIOK E3 snai.V

